Function…

On a TI calculator you can select the function variables menu

VARS ► 1

Selection can be done at any time. Pressing ▼ or ▲ brings you to the choices or enter the number of the variable.

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Display the secondary menu for the function variables menu.

FUNCTION
1:Y1
2:Y2
3:Y3
4:Y4
5:Y5
6:Y6
7:Y7
8:Y8
9:Y9
0:Y0

1: Y1

2: Y2

3: Y3

4: Y4

5: Y5

6: Y6

7: Y7

8: Y8

9: Y9

0: Y0